$OpenBSD$

Fix build error on wxWidgets 3
Based on: https://github.com/nielssp/colorgrab/commit/5ecc8e082197e5205fbe365e4897309967d7c26c

Index: src/tools/PaletteTool.cpp
--- src/tools/PaletteTool.cpp.orig
+++ src/tools/PaletteTool.cpp
@@ -173,7 +173,7 @@ void PaletteTool::RefreshTitle()
 void PaletteTool::AddColor(const wxColour& color, const wxString& name)
 {
     wxVector<wxVariant> data;
-    data.push_back(wxVariant(color));
+    data.push_back(wxVariant(wxAny(color)));
     data.push_back(wxVariant(name));
     colorList->AppendItem(data);
     isSaved = false;
